Allen's Test is one of the most recognisable and famous clinical signs. This journal club analyses the original publication in the 1920s.
Level of Evidence: Case Series
Allen wanted to replace "time-consuming mechanical contrivances with the critical examination by vision and palpation".
A prospective case series of 3 patients utilising the same technique that is still used today (over 90 years later)
Allen Test is a reproducible clinical sign for diagnosing patients with upper limb arterial disease.
The Allen Test has much wider clinical use. Even now, in Plastic Surgery, for example, when testing the patency of the palmar arch prior to a radial forearm flap.
Use these slides for your next journal club!